I use Family Tree Maker V4 (for Windoze 95), which I purchased way back when it was still owned by Broderbund. It worked just fine on Windoze 98, 2000, XP, and now XP Pro.

I does what it is supposed to do, and I always look at software as npot needing an upgrade until it no longer perfoems the task I want to to... that it still does, so i see no need to change it and a load of cash for another version or prigram.

You should still be able to find it on eBay or in used software/book stores at a bargain price.